standardnotes-server/packages/analytics/src/Domain/Handler/SubscriptionExpiredEventHandler.ts

import { DomainEventHandlerInterface, SubscriptionExpiredEvent } from '@standardnotes/domain-events'
import { inject, injectable } from 'inversify'

import TYPES from '../../Bootstrap/Types'
import { AnalyticsActivity } from '../Analytics/AnalyticsActivity'
import { AnalyticsStoreInterface } from '../Analytics/AnalyticsStoreInterface'
import { StatisticsMeasure } from '../Statistics/StatisticsMeasure'
import { StatisticsStoreInterface } from '../Statistics/StatisticsStoreInterface'
import { Period } from '../Time/Period'
import { GetUserAnalyticsId } from '../UseCase/GetUserAnalyticsId/GetUserAnalyticsId'

@injectable()
export class SubscriptionExpiredEventHandler implements DomainEventHandlerInterface {
  constructor(
    @inject(TYPES.GetUserAnalyticsId) private getUserAnalyticsId: GetUserAnalyticsId,
    @inject(TYPES.AnalyticsStore) private analyticsStore: AnalyticsStoreInterface,
    @inject(TYPES.StatisticsStore) private statisticsStore: StatisticsStoreInterface,
  ) {}

  async handle(event: SubscriptionExpiredEvent): Promise<void> {
    const { analyticsId } = await this.getUserAnalyticsId.execute({ userEmail: event.payload.userEmail })
    await this.analyticsStore.markActivity(
      [AnalyticsActivity.SubscriptionExpired, AnalyticsActivity.ExistingCustomersChurn],
      analyticsId,
      [Period.Today, Period.ThisWeek, Period.ThisMonth],
    )

    await this.statisticsStore.setMeasure(
      StatisticsMeasure.TotalCustomers,
      event.payload.totalActiveSubscriptionsCount,
      [Period.Today, Period.ThisWeek, Period.ThisMonth, Period.ThisYear],
    )
  }
}